JPH10227548A - Structure of ice making part of ice making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain high durability against thermal shock at ice making and deicing, and simultaneously shorten ice making and deicing cycles. SOLUTION: Evaporating tubes 44 taken out from a refrigeration system are arranged on the surface of an ice making base plate 26 meanderingly. Multiple attaching holes 26a are bored at predetermined intervals in lengthwise and crosswise to the ice making base plate 26 with pattern corresponding to the layout positions of the evaporator tubes 44. Ice making protrusions 24 are formed by unit forming cylindrical members of which edge parts are formed with taper and cylindrical inserting parts 24a of the diameter that can be inserted to the attaching holes 26a of the ice making base plate 26 at the other edge than the edge part where the taper part is formed. Brazing filler is filled between the attaching holes 26a of the ice making base plate 26 and the inserting parts 24a of the ice making protrusions 24 by vacuum brazing without any gaps and both of 26 and 24 are joined adherently by the brazing material 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a method in which a large number of ice making projections projecting from the lower surface of an ice making substrate are immersed in ice making water stored in a water dish to form an inverted dome-shaped ice mass on the ice making projections. The present invention relates to an ice making section of an ice making machine in which an ice making projection is attached to the ice making substrate by vacuum brazing.

[0002]

2. Description of the Related Art As an ice making machine for continuously producing a large number of ice blocks, ice making water is stored in a water tray at a required level, and an ice making projection is provided on an ice making substrate provided with an evaporating tube on the upper surface. There is known a simple ice maker configured to form an inverted dome-shaped ice block around the ice making projection by being immersed in ice making water. In such an ice machine,
The ice making substrate and the ice making protrusion are configured to be crimped in such a manner that both are scratched by press working in a state where the protrusion formed on the ice making protrusion is inserted into a mounting hole formed in the ice making substrate. Thereafter, the joint is hot-dip plated to increase the fixing strength.

[0003]

In the above-mentioned ice making machine, since the projections of the ice making projections are inserted into the mounting holes of the ice making board and then caulked, they are attached to each other. Is set slightly larger than the above, and a required gap exists between the two. In this manner, the plating material is difficult to enter into the narrow gap between the mounting hole and the protrusion in the plating process, and a slight pinhole may be generated at the joint. Then, the joint having such a pinhole repeatedly receives a thermal shock (heat shock) at the time of ice making or deicing, which causes a problem that a crack is generated in the plated portion. In addition, the ice making water accumulated on the ice making board penetrates into the gap between the projection of the ice making projection and the mounting hole of the ice making board through a crack in the plating portion, and the projection due to volume expansion when the ice making water freezes. It is pointed out that there is a fear that the gap between the ice making projection and the mounting hole is widened with time, and the ice making projection falls off the ice making substrate. Furthermore, since the evaporating tube and the ice making projection are connected via the ice making substrate, it takes time to conduct the cold air or the deicing heat supplied through the evaporating tube to the ice making projection. It is pointed out that the ice making and de-icing cycle is lengthened accordingly.

[0004] In addition to the simple ice machine described above, in various ice machines for producing ice cubes of a dice shape, plate ice of a required thickness, and other flake-shaped ice pieces, an ice making section in which an ice block is formed is provided with a plurality of ice making portions. There is a configuration in which members are joined to each other. For example, a cubic ice making small chamber defined downward in the ice making room is closed by a water tray from below to be openable and closable, and ice making water is jetted and supplied from the water tray to each ice making small chamber,
In a so-called closed-cell type ice machine in which ice cubes are gradually formed in the ice making chamber, the ice making chamber is
It is configured by joining a large number of partition plates to each other in a state of being arranged vertically and horizontally.

[0005] The large number of partition plates are joined to each other by brazing, but the gap between the two is extremely small, so that the brazing material does not easily enter, and the joining is performed in the same manner as in the simple ice making machine described above. Pinholes and the like occurred in the part. Therefore, even in such an ice making machine, there is a fear that a crack is generated with time in the joint, and the partition plate is dropped or deformed. In addition, heat exchange between the partition plate and the evaporator tube is not efficiently performed, which causes a problem that a cycle of ice making and deicing becomes longer.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the prior art, and has been proposed in order to solve the problem in a suitable manner. By adopting a structure that joins by
It is an object of the present invention to provide an ice making unit structure of an ice making machine that can obtain high durability against thermal shock during ice making and deicing, and can shorten the ice making and deicing cycle.

[0007]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve the intended object, the present invention provides an evaporating pipe connected to a refrigeration system having a compressor, a condenser, and the like, which is closely arranged, In an ice making machine configured by joining a plurality of members to each other, an ice maker in which an ice block having a required shape is formed, each of the plurality of members constituting the ice maker is vacuum-brazed between the two. It is characterized by being tightly joined by the poured brazing material.

In order to overcome the above-mentioned problems and achieve the intended object, another invention of the present application is to provide an evaporating pipe connected to a refrigeration system having a compressor, a condenser, etc. An ice-making substrate having a large number of ice-making members projecting and hanging on the lower surface thereof, and a water tray in which the ice-making members are immersed in ice-making water in an ice-making chamber defined so as to be tiltable and always horizontal. In an ice making machine configured such that ice making water freezes around the ice making member to form a required ice block, the insertion portions of the ice making member are inserted into each of the large number of mounting holes formed in the ice making substrate. In addition, the ice making substrate and each ice making member are tightly joined by a brazing material poured between them by vacuum brazing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an ice making unit structure of an ice making machine according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. FIG. 1 is a cross-sectional view schematically illustrating an ice maker according to an embodiment, in which a housing 10 constituting a main body of the ice maker stores a refrigerator CM such as a compressor CM and a condenser 12. A chamber 14, a box-shaped ice storage 18 which is located above and surrounded by a heat insulating material and defines an ice storage 16 therein, and an ice making unit 20 which is disposed above the ice storage 18. It is basically configured. The ice making unit 20, as described below with respect to FIGS. 2 and 3,
A water tray 22 for storing ice-making water at a predetermined level, and an ice-making substrate 26 having a large number of ice-making protrusions 24 as ice-making members immersed in the ice-making water are provided. In this case, the ice mass 27 formed on the ice making projection 24 can be discharged to the ice storage chamber 16 by tilting at a predetermined angle. The ice storage 18 is provided with an ice block discharging device 28, and the device 28 is configured to discharge the ice blocks 27 stored in the ice storage chamber 16 to the outside.

A cover 30 is detachably provided on the front of the ice storage 18, and the front of the cover 30 is
As shown in the figure, a tilting mechanism 32 of the water tray 22, a rocking mechanism 36 of the rocking plate 34, and the ice block discharging device 28 in the ice making unit 20 are collectively disposed. And each mechanism 3
The cover body 30 provided with the devices 2 and 34 and the device 28 is configured as one unit, which is detachably attached to the ice storage 18.

A water tray 22 constituting the ice making unit 20
2, is formed in a box shape which is opened upward, and can store ice making water at a predetermined level in an ice making chamber 38 defined therein. This water dish 22
On one side, a shaft support 22a is integrally formed, and the shaft support 22a is rotatably supported by a plurality of brackets 40 disposed above the ice storage 18 (FIG. 3). reference). The shaft supporting portion 22a is connected to a tilting mechanism 32 disposed on the cover body 30, and the water tray 22 is tilted obliquely downward around the shaft supporting portion 22a and returned obliquely upward by the mechanism 32. It is configured to be able to do. The ice making chamber 38 is supplied with a required amount of ice making water via a water supply pipe 42 which is detachably mounted on the ice making board 26.

An ice making board 26 is horizontally disposed and fixed above the inside of the ice storage 18 via the plurality of brackets 40, and is mounted on the upper surface of the ice making board 26 from a refrigeration system housed in the machine room 14. The evaporating pipe 44 that is led out is arranged in a meandering manner. As shown in FIG. 7, a number of mounting holes 26a are formed in the ice making substrate 26 at predetermined intervals in the vertical and horizontal directions in a pattern corresponding to the arrangement position of the evaporating tubes 44.
The ice making projection 24 is configured to protrude downward from the lower surface of the ice making substrate 26 via the. The ice making projection 24 is a cylindrical member having a tip portion formed into a slightly tapered shape. The other end of the tip portion provided with the tapered portion is provided with an ice making substrate 26.
A cylindrical insertion portion 24a having a diameter that can be inserted into the mounting hole 26a is formed integrally with the ice making substrate 26 with substantially the same dimensions as the thickness thereof. It is recommended that a chamfering process be performed on the periphery of the open end of the insertion portion 24a.

As shown in FIG. 5, the ice making projection 24 is attached to the ice making board 26 by inserting the ice making projection 24 into the insertion portion 24a.
Is inserted into the mounting hole 26a of the ice making board 26 from below, and a vacuum brazing process is performed with the ring-shaped brazing material 25a interposed between the two 26, 24. As a result, the ring-shaped brazing material 25a is melted, and the
6 and the ice making projection 24 (the mounting hole 26a and the insertion portion 24a).
6 and the lower surface of the substrate and the upper surface of the projection) without any gap.
As shown in the figure, the two members 26 and 24 are tightly joined by the brazing material 25. The open end face 24b of the ice making projection 24 inserted into the mounting hole 26a of the ice making board 26 at the insertion portion 24a is, as shown in FIG.
And the ice making substrate 26 and the insertion portion 24a are in close contact with the evaporating tube 44.

A large number of ice making projections 24 protruding from the lower surface of the ice making board 26 are used for the water tray 22 during the ice making operation.
It is immersed in ice making water stored in the area. By the operation of the refrigeration system, heat exchange with the refrigerant is performed in the evaporating tube 44, and the ice making projections 24 are cooled and maintained at 0 ° C. or less. As a result, as shown in FIG. Is formed.

In the ice tray 38 in the water tray 22, the swing plate 34 is arranged to be swingable.
4 is configured to be vertically driven to swing by a swing mechanism 36 disposed on the cover body 30. The rocking plate 34 functions to repeatedly move the ice making water up and down inside the ice making chamber 38 during the ice making operation to constantly move the ice making water and form the transparent ice block 27. The rocking plate 34 is provided to the rocking mechanism 36 when the ice making operation proceeds and the ice blocks 27 grow around the ice making projections 24 and come into contact with the ice blocks 27 when the rocking plate 34 moves upward. The ice making completion detection switch SW is turned ON to also detect the completion of ice making in the ice making unit 20.

[0016]

Next, the operation of the ice making unit structure of the ice making machine according to the embodiment will be described. Refrigerant is supplied from the refrigerant circulation pipe of the refrigerating system to the evaporating tube 44 by the compressor CM which is energized by turning on the power, and the heat exchange action thereof starts cooling the ice making projections 24 protruding from the ice making substrate 26. You. Since the ice making projections 24 are immersed in ice-making water, ice formation starts around the projections 24 and grows gradually to form an inverted dome-shaped ice block (see FIG. 4). At this time, the upper surface 24b of the ice making projection 24 and the upper surface 2 of the ice making substrate 26
The evaporating tube 44a is in close contact with the ice making substrate 26 and the ice making projection 24.
At the same time (see FIG. 5), since the ice making substrate 26 and the ice making projections 24 are tightly joined via the brazing material 25, heat exchange between the evaporating tube 44 and the ice making projections 24 is efficiently performed,
Ice making is completed in a short time. Moreover, since the heat conduction between the ice making substrate 26 and the ice making projections 24 is the same, stable and more uniform ice making becomes possible. During the ice making operation, the rocking plate 34 is repeatedly rocked by the rocking mechanism 36 in the ice making water in the ice making chamber 38, whereby the ice making water is constantly moved.

When the complete ice block 27 is formed in an inverted dome shape on the ice making projection 24, the ice making completion detection switch SW is turned ON via the rocking plate 34, thereby completing the ice making in the ice making unit 20. To detect. Then, the swing mechanism 36 is stopped, and the tilt mechanism 32 is started, so that the water tray 22 and the swing plate 34 start to tilt obliquely downward.
Then, the tilting mechanism 32 is stopped with the water tray 22 in the required tilting posture, and hot gas is supplied to the evaporating pipe 44 instead of the refrigerant by switching the valve in the refrigeration system. Thereby, the ice making projections 24 are formed through the evaporating tubes 44.
Is rapidly warmed. As a result, the connection between the ice making projection 24 and the ice block 27 is released, and the ice block 27 falls by its own weight and is stored in the ice storage chamber 16. In the deicing operation, the heat exchange between the evaporating tube 44 and the ice making projection 24 is efficiently performed, and the deicing is completed in a short time.

As described above, when the ice making operation and the ice removing operation are repeated, the thermal shock at that time is repeatedly applied to the joint between the ice making substrate 26 and the ice making projection 24. In this case, since the ice making substrate 26 and the ice making projections 24 of the embodiment are tightly and integrally joined by the brazing material 25 without pinholes, cracks due to thermal shock are effectively prevented. Is done. Therefore, the ice making projections 24 become
Can be prevented from falling off. Further, since the heat exchange between the evaporating tube 44 and the ice making projections 24 can be performed efficiently, the ice making and deicing cycles can be shortened, and the Nissan ice making ability can be improved. In addition, since a large number of ice making projections 24 can be attached to the ice making substrate 26 at the same time by the vacuum brazing process, the number of manufacturing steps and the manufacturing cost can be reduced.

In the above-described embodiment, an ice making section in which an ice making substrate and an ice making projection are joined in a simple ice making machine has been described as an example. However, the present invention is not limited to this, and a plurality of ice making sections are provided. The present invention can be applied to various types of ice machines that constitute an ice making unit by joining members together. For example, in a so-called closed-cell type ice making machine, a large number of partition plates constituting an ice making chamber are joined to each other by vacuum brazing, thereby preventing cracks from being generated and efficiently performing an ice making and de-icing cycle. Is achieved. Further, the evaporating tube may be arranged on the lower surface of the ice making substrate instead of the upper surface.

[0020]

As described above, according to the ice making unit structure of the ice making machine according to the present invention, the plurality of members constituting the ice making unit are almost completely adhered by the brazing material, and are caused by pinholes and the like. Thus, it is possible to prevent the members from being separated from each other or falling off. In addition, since each member is completely joined and integrated by the brazing material, it has semi-permanent durability against repeated thermal shocks during ice making and deicing,
The heat exchange efficiency with the evaporator tube is improved, and the ice making and de-icing cycles can be shortened.

Further, by making the ice making substrate and the ice making member almost completely adhere to each other with the brazing material, it is possible to prevent the ice making member from falling off the ice making substrate due to a pinhole or the like. Further, since the ice making substrate and the ice making member are completely joined and integrated by the brazing material, the material has semi-permanent durability against repeated thermal shocks during ice making and deicing. Furthermore, since the upper surface of the ice making substrate and the open end surface of the ice making member face the same plane, when an evaporating tube is provided on the upper surface of the ice making substrate, the evaporating tube is tightly attached to the ice making substrate and the ice making member without any gap. Will be arranged. Therefore, the efficiency of heat exchange between the evaporator tube and the ice making member is improved, and the ice making and deicing cycles can be shortened.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional view of an ice making machine according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing the ice making unit of the ice making machine according to the embodiment in a partially exploded state.

FIG. 3 is a sectional view of a main part of the ice making unit shown in FIG. 2;

FIG. 4 is an explanatory view showing an ice making unit in a state where ice making is completed.

FIG. 5 is an explanatory view showing an ice making substrate and ice making projections before vacuum brazing.

FIG. 6 is an explanatory view showing an ice making substrate and ice making projections processed by vacuum brazing;

FIG. 7 is an explanatory view showing an ice making substrate and an ice making projection processed by vacuum brazing;

[Explanation of Signs] 12 condenser, 22 water tray, 24 ice making projection (ice making member),
24a insertion part 24b open end face, 25 raw material, 26 ice making board, 26
a mounting hole 26b upper surface, 27 ice blocks, 38 ice making room, 44 evaporating tube,
CM compressor

Claims (3)

[Claims] An evaporating pipe (44) connected to a refrigeration system having a compressor (CM), a condenser (12), and the like is closely arranged, and a plurality of ice-making units for forming ice blocks of a required shape are provided. In the ice making machine constituted by joining the members (24, 26) to each other, each of the plurality of members (24, 26) constituting the ice making section is formed by vacuum brazing. An ice making unit structure for an ice making machine, which is tightly joined by a brazing material (25) poured therebetween. 2. An evaporating pipe (44) connected to a refrigeration system having a compressor (CM), a condenser (12) and the like, and the evaporating pipe (44) is provided, and a number of ice making members are provided on a lower surface. The ice making substrate (26) having the (24) projectingly suspended therefrom, and the ice making member (24) being tilted freely and always arranged horizontally, and into ice making water in an ice making room (38) defined therein.
And a water tray (22) in which the ice making water is frozen around the ice making member (24) to form a required ice block (27). The insertion part (24a) of the ice making member (24) is inserted into each of the large number of mounting holes (26a) drilled in the), and the ice making substrate (26) and each ice making member (24) are An ice making unit structure for an ice making machine, characterized in that it is tightly joined by a brazing material (25) poured between the two (26, 24) by processing. 3. When the insertion portion (24a) of the ice making member (24) is inserted into the mounting hole (26a) of the ice making substrate (26), the insertion portion (24a)
The ice making section structure of an ice making machine according to claim 2, wherein the open end face (24b) is set to be flush with the upper surface (26b) of the ice making substrate (26).